Here are some maps for the end of the month into early Dec as the ECMWF blasts an arctic front down the Plains. This is one random run, but there is some ensemble support for at least something like this.

Only one of those that didn't really work out at all was December 1979, which only resulted in a 12 hour limp noodle Fraser River trickle on the 15th. Of course that pattern more or less reset a few weeks later and then crushed us.

Reports of mixed precip all over the Lower Mainland now. Burnaby, Surrey, Abbotsford, Mission, Langley.

That one's the real deal guys.

Some really good analogs showing up